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. 2014 Apr 9;9(4):e93854. doi: 10.1371/journal.pone.0093854

Figure 8. Partial total ion current chromatograms showing the methylated lipids extracted from a ceramic sherd (G18E).

Figure 8

Cn :x - fatty acids with carbon length n and number of unsaturations x, DCn - α,ω-dicarboxylic acids with carbon length n, br - branched chain acids, phytanic acid, pristanic acid, 4,8,12-TMTD - 4,8,12-tryimethyltridecanoic acid), IS - internal standard (n-hexatriacontane). m/z 105 ion chromatogram showing the presence of ω(ο-alkylphenyl)alkanoic acids with 16 (+), 18(*), 20(#) and 22 (ο) carbon atoms.